Ade Advanced Optics Red Dot Elevation Delrin Shim – Optic Riser Plate for RD3 Series, Hex Dragonfly, Mini Shot, Tempus – 1° Adapter Plate for Sight Zero Correction – Precision Fit Shim for Red Dots

So I originally bought the Venom for my Mossberg 590, since it came with a Picatinny/side saddle attachment but unfortunately the sight did not adjust enough, and shot placement was low, even at max settings. This shim fit perfectly on the mount that came with the optic, no modifications needed, and functioned exactly as described. I haven’t had a chance to take it out yet, but it does fit well, and appears to line the sight window up slightly better than without it. Will see in a week when I have a chance to take it out. But for a stock vortex venom, it fits.

This shim worked very well for me on a doctor plate installed on a 1911 commander size. The green dot I installed ran out of elevation adjustment. The shim has a 1 degree raise at the back to help with the elevation. The whole setup is working great. ADE offers to send the shim for free if you buy their optic but I didn't want to wait.

I was having a hard time getting my red dot lowered enough to begin sighting in on my M&P Shield Full Frame pistol, so off to Amazon I went. After doing a quick search for “pistol sight shim”, the Ade shim popped up near the top of the search feature. So I figured that I might as well give it a shot since it cost like $10. Shipping was quick; delivered two days after order, like most prime products. The product feels like plastic…but I believe it is still metallic as the battery for my sight is operational and could only conduct with a metallic object. I didn’t have any issues with mounting like some of the other complaints, everything seemed to line up perfect. The only issue I had was figuring out what screws to use that came with my mounting plate, as the normal ones weren’t quite long enough once I added in the shim. I did have an extra set of screws that fit perfect so it came together pretty well. Once tightened down, everything looks good and feels tight, which is what anyone would want when using precision optics mounts. My only gripe, if you could call it one, is that it just “feels cheap” due to it being pretty flimsy…but hell, what can you expect with with a 1 degree shim? If you’re on the fence, just make the decision to get one. It worked out very well for me and should for you as well.

I have many firearms with red dots, including a number of Vortex Venoms. I sent my Glock 21 slide to be milled for another Vortex Venom. When it arrived back to me, the fitment onto the slide seemed very precise. However, I could not lower the elevation to closer than about 55 MOA from POA / POI. I was trying to imagine how I could resolve this without either sending my slide back for re-milling and waiting another 4-6 weeks, or should I remove one of my other well-zeroed Venoms from its host to check the incline of the milling on my slide. I racked my brain to figure out how I could securely shim the Venom on my G21. That's when I, on a whim< entered "venom Red Dot Shim" into Amazon's search. VOILA! This product popped up. I just mounted it to check, then blue Loctited it. It is now perfectly zeroed. Granted, my elevation adjustment is maxed out, but it IS perfectly zeroed. I will know in a month or so if it holds that adjustment, but I see no overt reason why it will not! HIGHLY recommend! Shot Doc Firearms and Training

I've been shooting in Carry Optic division for some time, and sent the slide of my competition pistol to be milled for my red dot sight. The milling and refinishing was perfect, and the sight mounted down in the slide was better than before, mounted on a rear-sight dovetail plate. Almost perfect. When re-zeroing the sight, it ran out of vertical adjustment just *barely* before it was exactly right. (Not the fault of the machining.) Deciding I needed to install a shim to get things just right, I chose get an Ade Advanced Optics shim (make absolutely certain that you're getting the right shim for your RDS), installed it in a couple minutes, needing no tools other than the driver bit for installing the sight's screws (use thread locker). The sight is visually perfect in its milled slot, completely solid, not showing any shim at all, short of using a magnifier. The result on re-zeroing is that the vertical adjustment is near the middle of its range, and life is good. Now, if this 70+ year old continues to practice and improve, all will be well.

After reading the reviews I thought I would take a chance. Well, I got burned! This product is garbage. The holes DO NOT line up at all. If you try to enlarge them the delrin cracks. How can the holes be off by that much? The mount pictured is a EGW made in the USA Red Dot mount for Springfield. The new dragonfly HEX Red Dot needed a shim so I didn't have to run the elevation screw to max setting. Advice, buy the UM Tactical shim. I used them before and they fit perfectly without ANY modifications. Unfortunately, they were back ordered and I needed a faster delivery. Don't make the same mistake I did...

Like many reviews, this shim did not fit correctly for the mounting plate and ADE RD3-12-Pro red dot optic. To make it fit, I had to elongate the mounting holes (Dremel tool) which were quite a bit off. Once mounted, the shim serves it purpose for aligning the optics to my firearm. However, at $12 for a piece of plastic with incorrectly spaced alignment holes, I'd barely give this item 3 stars.

After a few weeks of researching shims I decided on this one. I was pleasantly surprised with how it bolted on my pistol. Everything lined up perfectly and I am well pleased with the product.